carina

• 名词，指各种龙骨状结构或脊状突起，例如鸟类胸骨上的龙骨突，或豌豆花中由合生花瓣形成的结构。

A noun referring to any of various keel-shaped structures or ridges, such as the ridge on the breastbone of a bird or the structure formed by the fused petals of a pea blossom.

1. Keel-shaped structure in anatomyC1formalscientific

   A keel-like ridge or structure, especially the prominent ridge on the breastbone (sternum) of birds to which flight muscles attach.

   解剖学中的龙骨状结构

   • The carina of a bird's sternum provides a large surface area for flight muscle attachment.
   • In many birds, the carina is highly developed to support powerful wing movements.
   • The fossil showed a well-preserved carina, indicating the species was capable of flight.

   同义词keel

2. Keel of a flowerC1formalscientific

   The fused, boat-shaped lower petals of a pea or bean flower (Fabaceae family).

   龙骨瓣

   • The carina of a sweet pea flower encloses the reproductive organs.
   • Botanists often examine the carina to identify different legume species.
   • The carina is one of the five petals in a typical papilionaceous flower.

   同义词keel